Tshwane and C40 welcomed representatives from 12 African cities for two days of discussions about ways to address the climate crisis while boosting development.| C40 Cities
Unleashing the power of urban just transitions With nearly 16 million green jobs worldwide, mega-cities are key to driving inclusive...| C40 Cities
Discover how Johannesburg is tackling air pollution through the Pause and Breathe campaign, research, and bold actions to protect public health.| C40 Cities
Discover how C40 mayors are driving change at London Climate Action Week to build fairer, healthier, and more resilient cities.| C40 Cities
Discover how cities are accelerating climate action in the new report “From Paris to Belém: A Decade of Local Climate Leadership”.| C40 Cities
Thought Leadership| C40 Cities
A decade after the Paris Agreement, urban climate leadership is driving progress from the ground up In the last decade,...| C40 Cities
The Bruhat Bengaluru Mahanagara Palike (BBMP), in partnership with Bengaluru Solid Waste Management Limited (BSWML) and C40 Cities, is advancing...| C40 Cities
The global development community gathered last week in Seville to discuss the future of development finance and the Sustainable Development Goals.| C40 Cities
London Climate Action Week 2025 showcased how cities lead on climate. Discover how mayors are shifting from negotiation to delivery.| C40 Cities
16 cities signed a commitment to address flooding and drought, and improve resilience by 2030| C40 Cities
The UrbanShift Africa forum highlighted the climate achievements and challenges of African cities as mayors across the continent continue to stand out as global climate leaders.| C40 Cities
C40 Cities and the Global Covenant of Mayors for Climate & Energy's new report looks at how national governments can increase finance for subnational climate action.| C40 Cities
Learn more about how C40 Cities and The Ramboll Foundation are working together to put communities at the heart of city planning.| C40 Cities
Learn more about how C40 Cities and the Centre for Liveable Cities' are working together to advance urban sustainability and resilience.| C40 Cities
Learn about the 2025 C40 World Mayors Summit in Rio de Janeiro just days before COP30 negotiations begin in Belém.| C40 Cities
C40's 2024 annual report is here. Read the foreword written by co-chairs Mayor of London Sadiq Khan and Mayor of Freetown Yvonne Aki-Sawyerr.| C40 Cities
Today, C40 Cities launches VISIBLE, a project that will harness the power of cities to decarbonise their built environments in a way that is both just and economically viable.| C40 Cities
C40 Cities joins global leaders to unveil an ambitious US$800 billion city climate finance ask to drive clean energy, sustainable transit, and affordable, energy-efficient housing in cities worldwide.| C40 Cities
The C40 Cities Finance Facility (CFF) is excited to announce its latest ‘Call for City Applications’ to advance climate action infrastructure projects with cities in the Global South.| C40 Cities
Copenhagen Climate Ministerial advances innovative climate solutions at first-ever meeting with subnational governments Copenhagen, Denmark (7 May 2025) – COP30...| C40 Cities
Multilateral Development Banks (MDBs) convened to discuss plans to scale up and improve access to climate finance for cities.| C40 Cities
For Europe to lead in sustainable industry and achieve its climate goals, the Clean Industrial Deal must be bold, ambitious, and city-focused.| C40 Cities
Negotiations at the International Maritime Organization end in a low-ambition agreement, ruling out a carbon levy on shipping emissions.| C40 Cities
Austin, Miami, New York and Washington D.C have joined forces to participate in the C40 Heat, Health, and Equity Challenge Fund.| C40 Cities
A public statement by C40 Co-Chairs, Mayor of London and the Mayor of Freetown, at the WHO Conference on Air Quality in Cartagena, Colombia.| C40 Cities
Brazil announced the 50 cities selected for the first phase of Brazil’s world-leading Green Resilient Model Cities Program.| C40 Cities
Laneshift: Rio de Janeiro has taken a step toward sustainable mobility with its first public fast-charging station.| C40 Cities
City representatives and financial experts gathered to explore financing opportunities for municipal solid waste initiatives.| C40 Cities
C40 Cities joins the Coalition for Higher Ambition in urging bold, science-based EU targets for 2040.| C40 Cities
The Journal of City Climate Policy and Economy is seeking original research and policy guidelines for an open-call issue due to be published in August 2026.| C40 Cities
The Healthy Cities Challenge by Novo Nordisk and C40 has selected 3 winning projects to enhance community health.| C40 Cities
IBM and C40 Cities will collaborate through the IBM Sustainability Accelerator and scale up social innovation action in cities.| C40 Cities
Despite President Trump's withdrawal of the US from the Paris Climate Agreement, mayors are united in action to confront the climate crisis.| C40 Cities
What demands do mayors have for national leaders at the G20 Summit and COP29, following a successful U20?| C40 Cities
C40's VISIBLE project, in partnership with Laudes Foundation, supports London, Madrid & Oslo in piloting clean construction initiatives.| C40 Cities
The updated United States Nationally Determined Contribution (NDC) charts a path to net zero, with targets that rely on cities' leadership.| C40 Cities
Foreword from the C40-MMC Task Force on Climate and Migration: 2021–2024 Impact Report by Mark Watts and Vittoria Zanuso| C40 Cities
Casablanca, Morocco, is to become the newest member of C40 Cities on 1 January 2025| C40 Cities
Since 2022, C40’s Good, Green Jobs and Just Transition peer group has showcased how climate action can good green jobs.| C40 Cities
Ibrahima Cissé, Minister Governor of the Autonomous District of Abidjan, Côte d’Ivoire, has been elected Vice Chair for Africa of the C40 Steering Committee.| C40 Cities
Cities are essential to accelerating climate action with a transformative vision for COP30 and future COP summits. Empowering local leaders to drive implementation can shift COPs from negotiation to action delivering solutions rooted in accountability, inclusion, and tangible progress.| C40 Cities
C40 Cities reflects on the outcomes of COP29 in Baku, Azerbaijan, and what it means for cities as they lead the climate fight.| C40 Cities
C40 and Carrier will work together to support cities in the midst of extreme heat events in cities.| C40 Cities
C40 Cities partners with NUS Cities, pledging to help city leaders tackle the challenges of the climate emergency.| C40 Cities
Press Release| C40 Cities
C40 Cities Co-Chairs Mayors Sadiq Khan and Yvonne Aki-Sawyerr and C40 Executive Director Mark Watts reaffirm mayors' commitment to tackling the climate crisis following Donald Trump’s election.| C40 Cities
C40 Cities, Community Jameel and UrbanShift launch a new 'Climate Action Guide for Urban Planners' at the World Urban Forum in Cairo, Egypt.| C40 Cities
Through C40’s Youth Reinventing Cities design competitions, youth actively play a role in shaping a greener, more just urban future for all.| C40 Cities
Ahead of the Smart City Expo World Congress in Barcelona, C40 has teamed up with Reckitt to urge businesses to take climate action in cities.| C40 Cities
Partners of the LA - Long Beach - Shanghai Green Shipping Corridor launch their inaugural progress report, outlining milestones and next steps.| C40 Cities
Lessons from C40's masterclass on loss and damage and inclusive climate action in Addis Ababa| C40 Cities
Learn about C40 Cities' It's in the Air campaign, which focused on clean air zones as a major solution to the ongoing climate crisis.| C40 Cities
C40's highlights from the 2024 Climate Week in New York City| C40 Cities
The Rockefeller Foundation announced a new initiative to help cities tackle the health impacts of climate breakdown, including working with C40 Cities.| C40 Cities
C40 Co-Chair Mayor Sadiq Khan was joined by actor and water advocate Matt Damon and fellow Water.org co-founder Gary White at The Climate Pledge Summit.| C40 Cities
C40 Cities Executive Director Mark Watts has congratulated the City of Fortaleza for winning the prestigious WRI Ross Center Prize for Cities for pioneering a first-of-its-kind climate budgeting project.| C40 Cities
C40 and The Climate Pledge are joining forces with the financial sector to develop products that address specific market needs for last-mile delivery in Latin America.| C40 Cities
The Pact was released today by the UN Secretary-General at the Summit of the Future in New York City The...| C40 Cities
Ahead of the UN Summit of the Future, mayors are urging Heads of State to step up action and leave fossil fuels behind.| C40 Cities